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At 0313 EST on March 9th, 2021, during per … At 0313 EST on March 9th, 2021, during performance of Unit 1 High Pressure Coolant Injection (HPCI) valve exercising, the inboard vacuum breaker isolation valve did not stroke closed as expected, but remained mid-position. The affected penetration of primary containment was isolated by closing the outboard HPCI vacuum breaker isolation valve. This results in an unplanned inoperability of the Unit 1 HPCI system.</br>This is being reported as a loss of an entire safety function condition in accordance with 10CFR50.72(b)(3)(v)(D). </br>The licensee notified the NRC Resident Inspector.</br>Unit 1 is in a 14-day LCO for Tech Spec 3.5.1(d), HPCI inoperability. Tech Spec 3.6.1.3(a), Containment Penetration Valve, was completed with closing the outboard HPCI vacuum breaker isolation valve. The Units are in a normal offsite power line-up.its are in a normal offsite power line-up. +
08:13:00, 9 March 2021 +
55,128 +
08:08:00, 9 March 2021 +
08:13:00, 9 March 2021 +
At 0313 EST on March 9th, 2021, during per … At 0313 EST on March 9th, 2021, during performance of Unit 1 High Pressure Coolant Injection (HPCI) valve exercising, the inboard vacuum breaker isolation valve did not stroke closed as expected, but remained mid-position. The affected penetration of primary containment was isolated by closing the outboard HPCI vacuum breaker isolation valve. This results in an unplanned inoperability of the Unit 1 HPCI system.</br>This is being reported as a loss of an entire safety function condition in accordance with 10CFR50.72(b)(3)(v)(D). </br>The licensee notified the NRC Resident Inspector.</br>Unit 1 is in a 14-day LCO for Tech Spec 3.5.1(d), HPCI inoperability. Tech Spec 3.6.1.3(a), Containment Penetration Valve, was completed with closing the outboard HPCI vacuum breaker isolation valve. The Units are in a normal offsite power line-up.its are in a normal offsite power line-up. +
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05000387/LER-2021-001, Electri Station, Unplanned Lnoperability of the High Pressure Coolant Injection (HPCI) System Due to a Primary Containment Isolation (PCIV) Valve Failure to Stroke Full Closed On-demand Due to an Intermittent Break +, Electri Station + and Unplanned Lnoperability of the High Pressure Coolant Injection (HPCI) System Due to a Primary Containment Isolation (PCIV) Valve Failure to Stroke Full Closed On-demand Due to an Intermittent Break +
00:00:00, 9 March 2021 +
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12:30:16, 11 March 2021 +
08:08:00, 9 March 2021 +
true +
false +
-0.00333 d (-0.08 hours, -4.761905e-4 weeks, -1.09584e-4 months) +
08:13:00, 9 March 2021 +
TS-3.5.1 + and TS-3.6.1.3 +
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